WebSVN – HelenOS-historic – Diff – /kernel/trunk/genarch/src/i8042/i8042.c


/*
 * Copyright (C) 2001-2004 Jakub Jermar
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
/** @addtogroup genarch
 * @{
 */
/**
 * @file
 * @brief   i8042 processor driver.
 *
 * It takes care of low-level keyboard functions.
 */
 
#include <genarch/i8042/i8042.h>
#include <arch/drivers/i8042.h>
#include <arch/interrupt.h>
#include <cpu.h>
#include <arch/asm.h>
#include <arch.h>
#include <synch/spinlock.h>
#include <typedefs.h>
#include <console/chardev.h>
#include <console/console.h>
#include <macros.h>
#include <interrupt.h>
 
/* Keyboard commands. */
#define KBD_ENABLE  0xf4
#define KBD_DISABLE 0xf5
#define KBD_ACK     0xfa
 
/*
 * 60  Write 8042 Command Byte: next data byte written to port 60h is
 *     placed in 8042 command register. Format:
 *
 *    |7|6|5|4|3|2|1|0|8042 Command Byte
 *     | | | | | | | `---- 1=enable output register full interrupt
 *     | | | | | | `----- should be 0
 *     | | | | | `------ 1=set status register system, 0=clear
 *     | | | | `------- 1=override keyboard inhibit, 0=allow inhibit
 *     | | | `-------- disable keyboard I/O by driving clock line low
 *     | | `--------- disable auxiliary device, drives clock line low
 *     | `---------- IBM scancode translation 0=AT, 1=PC/XT
 *     `----------- reserved, should be 0
 */
 
#define i8042_SET_COMMAND   0x60
#define i8042_COMMAND       0x69
 
#define i8042_BUFFER_FULL_MASK  0x01
#define i8042_WAIT_MASK     0x02
#define i8042_MOUSE_DATA        0x20
 
#define SPECIAL     '?'
#define KEY_RELEASE 0x80
 
/**
 * These codes read from i8042 data register are silently ignored.
 */
#define IGNORE_CODE 0x7f
 
static void key_released(uint8_t sc);
static void key_pressed(uint8_t sc);
static char key_read(chardev_t *d);
 
#define PRESSED_SHIFT       (1<<0)
#define PRESSED_CAPSLOCK    (1<<1)
#define LOCKED_CAPSLOCK     (1<<0)
 
#define ACTIVE_READ_BUFF_SIZE 16    /* Must be power of 2 */
 
static uint8_t active_read_buff[ACTIVE_READ_BUFF_SIZE];
 
SPINLOCK_INITIALIZE(keylock);       /**< keylock protects keyflags and lockflags. */
static volatile int keyflags;       /**< Tracking of multiple keypresses. */
static volatile int lockflags;      /**< Tracking of multiple keys lockings. */
 
static void i8042_suspend(chardev_t *);
static void i8042_resume(chardev_t *);
 
static chardev_t kbrd;
static chardev_operations_t ops = {
    .suspend = i8042_suspend,
    .resume = i8042_resume,
    .read = key_read
};
 
/** Primary meaning of scancodes. */
static char sc_primary_map[] = {
    SPECIAL, /* 0x00 */
    SPECIAL, /* 0x01 - Esc */
    '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '-', '=',
    '\b', /* 0x0e - Backspace */
    '\t', 'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p', '[', ']', '\n',
    SPECIAL, /* 0x1d - LCtrl */
    'a', 's', 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';', '\'',
    '`',
    SPECIAL, /* 0x2a - LShift */
    '\\',
    'z', 'x', 'c', 'v', 'b', 'n', 'm', ',', '.', '/',
    SPECIAL, /* 0x36 - RShift */
    '*',
    SPECIAL, /* 0x38 - LAlt */
    ' ',
    SPECIAL, /* 0x3a - CapsLock */
    SPECIAL, /* 0x3b - F1 */
    SPECIAL, /* 0x3c - F2 */
    SPECIAL, /* 0x3d - F3 */
    SPECIAL, /* 0x3e - F4 */
    SPECIAL, /* 0x3f - F5 */
    SPECIAL, /* 0x40 - F6 */
    SPECIAL, /* 0x41 - F7 */
    SPECIAL, /* 0x42 - F8 */
    SPECIAL, /* 0x43 - F9 */
    SPECIAL, /* 0x44 - F10 */
    SPECIAL, /* 0x45 - NumLock */
    SPECIAL, /* 0x46 - ScrollLock */
    '7', '8', '9', '-',
    '4', '5', '6', '+',
    '1', '2', '3',
    '0', '.',
    SPECIAL, /* 0x54 - Alt-SysRq */
    SPECIAL, /* 0x55 - F11/F12/PF1/FN */
    SPECIAL, /* 0x56 - unlabelled key next to LAlt */
    SPECIAL, /* 0x57 - F11 */
    SPECIAL, /* 0x58 - F12 */
    SPECIAL, /* 0x59 */
    SPECIAL, /* 0x5a */
    SPECIAL, /* 0x5b */
    SPECIAL, /* 0x5c */
    SPECIAL, /* 0x5d */
    SPECIAL, /* 0x5e */
    SPECIAL, /* 0x5f */
    SPECIAL, /* 0x60 */
    SPECIAL, /* 0x61 */
    SPECIAL, /* 0x62 */
    SPECIAL, /* 0x63 */
    SPECIAL, /* 0x64 */
    SPECIAL, /* 0x65 */
    SPECIAL, /* 0x66 */
    SPECIAL, /* 0x67 */
    SPECIAL, /* 0x68 */
    SPECIAL, /* 0x69 */
    SPECIAL, /* 0x6a */
    SPECIAL, /* 0x6b */
    SPECIAL, /* 0x6c */
    SPECIAL, /* 0x6d */
    SPECIAL, /* 0x6e */
    SPECIAL, /* 0x6f */
    SPECIAL, /* 0x70 */
    SPECIAL, /* 0x71 */
    SPECIAL, /* 0x72 */
    SPECIAL, /* 0x73 */
    SPECIAL, /* 0x74 */
    SPECIAL, /* 0x75 */
    SPECIAL, /* 0x76 */
    SPECIAL, /* 0x77 */
    SPECIAL, /* 0x78 */
    SPECIAL, /* 0x79 */
    SPECIAL, /* 0x7a */
    SPECIAL, /* 0x7b */
    SPECIAL, /* 0x7c */
    SPECIAL, /* 0x7d */
    SPECIAL, /* 0x7e */
    SPECIAL, /* 0x7f */
};
 
/** Secondary meaning of scancodes. */
static char sc_secondary_map[] = {
    SPECIAL, /* 0x00 */
    SPECIAL, /* 0x01 - Esc */
    '!', '@', '#', '$', '%', '^', '&', '*', '(', ')', '_', '+',
    SPECIAL, /* 0x0e - Backspace */
    '\t', 'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P', '{', '}', '\n',
    SPECIAL, /* 0x1d - LCtrl */
    'A', 'S', 'D', 'F', 'G', 'H', 'J', 'K', 'L', ':', '"',
    '~',
    SPECIAL, /* 0x2a - LShift */
    '|',
    'Z', 'X', 'C', 'V', 'B', 'N', 'M', '<', '>', '?',
    SPECIAL, /* 0x36 - RShift */
    '*',
    SPECIAL, /* 0x38 - LAlt */
    ' ',
    SPECIAL, /* 0x3a - CapsLock */
    SPECIAL, /* 0x3b - F1 */
    SPECIAL, /* 0x3c - F2 */
    SPECIAL, /* 0x3d - F3 */
    SPECIAL, /* 0x3e - F4 */
    SPECIAL, /* 0x3f - F5 */
    SPECIAL, /* 0x40 - F6 */
    SPECIAL, /* 0x41 - F7 */
    SPECIAL, /* 0x42 - F8 */
    SPECIAL, /* 0x43 - F9 */
    SPECIAL, /* 0x44 - F10 */
    SPECIAL, /* 0x45 - NumLock */
    SPECIAL, /* 0x46 - ScrollLock */
    '7', '8', '9', '-',
    '4', '5', '6', '+',
    '1', '2', '3',
    '0', '.',
    SPECIAL, /* 0x54 - Alt-SysRq */
    SPECIAL, /* 0x55 - F11/F12/PF1/FN */
    SPECIAL, /* 0x56 - unlabelled key next to LAlt */
    SPECIAL, /* 0x57 - F11 */
    SPECIAL, /* 0x58 - F12 */
    SPECIAL, /* 0x59 */
    SPECIAL, /* 0x5a */
    SPECIAL, /* 0x5b */
    SPECIAL, /* 0x5c */
    SPECIAL, /* 0x5d */
    SPECIAL, /* 0x5e */
    SPECIAL, /* 0x5f */
    SPECIAL, /* 0x60 */
    SPECIAL, /* 0x61 */
    SPECIAL, /* 0x62 */
    SPECIAL, /* 0x63 */
    SPECIAL, /* 0x64 */
    SPECIAL, /* 0x65 */
    SPECIAL, /* 0x66 */
    SPECIAL, /* 0x67 */
    SPECIAL, /* 0x68 */
    SPECIAL, /* 0x69 */
    SPECIAL, /* 0x6a */
    SPECIAL, /* 0x6b */
    SPECIAL, /* 0x6c */
    SPECIAL, /* 0x6d */
    SPECIAL, /* 0x6e */
    SPECIAL, /* 0x6f */
    SPECIAL, /* 0x70 */
    SPECIAL, /* 0x71 */
    SPECIAL, /* 0x72 */
    SPECIAL, /* 0x73 */
    SPECIAL, /* 0x74 */
    SPECIAL, /* 0x75 */
    SPECIAL, /* 0x76 */
    SPECIAL, /* 0x77 */
    SPECIAL, /* 0x78 */
    SPECIAL, /* 0x79 */
    SPECIAL, /* 0x7a */
    SPECIAL, /* 0x7b */
    SPECIAL, /* 0x7c */
    SPECIAL, /* 0x7d */
    SPECIAL, /* 0x7e */
    SPECIAL, /* 0x7f */
};
 
static void i8042_interrupt(int n, istate_t *istate);
static void i8042_wait(void);
 
static iroutine oldvector;
/** Initialize keyboard and service interrupts using kernel routine */
void i8042_grab(void)
{
    oldvector = exc_register(VECTOR_KBD, "i8042_interrupt", (iroutine) i8042_interrupt);
    i8042_wait();
    i8042_command_write(i8042_SET_COMMAND);
    i8042_wait();
    i8042_data_write(i8042_COMMAND);
    i8042_wait();
}
/** Resume the former interrupt vector */
void i8042_release(void)
{
    if (oldvector)
        exc_register(VECTOR_KBD, "user_interrupt", oldvector);
}
 
/** Initialize i8042. */
void i8042_init(void)
{
    int i;
 
    i8042_grab();
        /* Prevent user from accidentaly releasing calling i8042_resume
     * and disabling keyboard
     */
    oldvector = NULL;
 
    trap_virtual_enable_irqs(1<<IRQ_KBD);
    chardev_initialize("i8042_kbd", &kbrd, &ops);
    stdin = &kbrd;
 
    /*
     * Clear input buffer.
     * Number of iterations is limited to prevent infinite looping.
     */
    for (i = 0; (i8042_status_read() & i8042_BUFFER_FULL_MASK) && i < 100; i++) {
        i8042_data_read();
    }  
}
 
/** Process i8042 interrupt.
 *
 * @param n Interrupt vector.
 * @param istate Interrupted state.
 */
void i8042_interrupt(int n, istate_t *istate)
{
    uint8_t x;
    uint8_t status;
 
    while (((status=i8042_status_read()) & i8042_BUFFER_FULL_MASK)) {
        x = i8042_data_read();
 
        if ((status & i8042_MOUSE_DATA))
            continue;
 
        if (x & KEY_RELEASE)
            key_released(x ^ KEY_RELEASE);
        else
            key_pressed(x);
    }
    trap_virtual_eoi();
}
 
/** Wait until the controller reads its data. */
void i8042_wait(void) {
    while (i8042_status_read() & i8042_WAIT_MASK) {
        /* wait */
    }
}
 
/** Process release of key.
 *
 * @param sc Scancode of the key being released.
 */
void key_released(uint8_t sc)
{
    spinlock_lock(&keylock);
    switch (sc) {
        case SC_LSHIFT:
        case SC_RSHIFT:
        keyflags &= ~PRESSED_SHIFT;
        break;
        case SC_CAPSLOCK:
        keyflags &= ~PRESSED_CAPSLOCK;
        if (lockflags & LOCKED_CAPSLOCK)
            lockflags &= ~LOCKED_CAPSLOCK;
        else
            lockflags |= LOCKED_CAPSLOCK;
        break;
        default:
        break;
    }
    spinlock_unlock(&keylock);
}
 
/** Process keypress.
 *
 * @param sc Scancode of the key being pressed.
 */
void key_pressed(uint8_t sc)
{
    char *map = sc_primary_map;
    char ascii = sc_primary_map[sc];
    bool shift, capslock;
    bool letter = false;
 
    spinlock_lock(&keylock);
    switch (sc) {
    case SC_LSHIFT:
    case SC_RSHIFT:
            keyflags |= PRESSED_SHIFT;
        break;
    case SC_CAPSLOCK:
        keyflags |= PRESSED_CAPSLOCK;
        break;
    case SC_SPEC_ESCAPE:
        break;
    case SC_LEFTARR:
        chardev_push_character(&kbrd, 0x1b);
        chardev_push_character(&kbrd, 0x5b);
        chardev_push_character(&kbrd, 0x44);
        break;
    case SC_RIGHTARR:
        chardev_push_character(&kbrd, 0x1b);
        chardev_push_character(&kbrd, 0x5b);
        chardev_push_character(&kbrd, 0x43);
        break;
    case SC_UPARR:
        chardev_push_character(&kbrd, 0x1b);
        chardev_push_character(&kbrd, 0x5b);
        chardev_push_character(&kbrd, 0x41);
        break;
    case SC_DOWNARR:
        chardev_push_character(&kbrd, 0x1b);
        chardev_push_character(&kbrd, 0x5b);
        chardev_push_character(&kbrd, 0x42);
        break;
    case SC_HOME:
        chardev_push_character(&kbrd, 0x1b);
        chardev_push_character(&kbrd, 0x4f);
        chardev_push_character(&kbrd, 0x48);
        break;
    case SC_END:
        chardev_push_character(&kbrd, 0x1b);
        chardev_push_character(&kbrd, 0x4f);
        chardev_push_character(&kbrd, 0x46);
        break;
    case SC_DELETE:
        chardev_push_character(&kbrd, 0x1b);
        chardev_push_character(&kbrd, 0x5b);
        chardev_push_character(&kbrd, 0x33);
        chardev_push_character(&kbrd, 0x7e);
        break;
    default:
            letter = is_lower(ascii);
        capslock = (keyflags & PRESSED_CAPSLOCK) || (lockflags & LOCKED_CAPSLOCK);
        shift = keyflags & PRESSED_SHIFT;
        if (letter && capslock)
            shift = !shift;
        if (shift)
            map = sc_secondary_map;
        chardev_push_character(&kbrd, map[sc]);
        break;
    }
    spinlock_unlock(&keylock);
}
 
/* Called from getc(). */
void i8042_resume(chardev_t *d)
{
}
 
/* Called from getc(). */
void i8042_suspend(chardev_t *d)
{
}
 
static uint8_t active_read_buff_read(void)
{
    static int i=0;
    i &= (ACTIVE_READ_BUFF_SIZE-1);
    if(!active_read_buff[i]) {
        return 0;
    }
    return active_read_buff[i++];
}
 
static void active_read_buff_write(uint8_t ch)
{
    static int i=0;
    active_read_buff[i] = ch;
    i++;
    i &= (ACTIVE_READ_BUFF_SIZE-1);
    active_read_buff[i]=0;
}
 
 
static void active_read_key_pressed(uint8_t sc)
{
    char *map = sc_primary_map;
    char ascii = sc_primary_map[sc];
    bool shift, capslock;
    bool letter = false;
 
    /*spinlock_lock(&keylock);*/
    switch (sc) {
    case SC_LSHIFT:
    case SC_RSHIFT:
            keyflags |= PRESSED_SHIFT;
        break;
    case SC_CAPSLOCK:
        keyflags |= PRESSED_CAPSLOCK;
        break;
    case SC_SPEC_ESCAPE:
        break;
    case SC_LEFTARR:
        active_read_buff_write(0x1b);
        active_read_buff_write(0x5b);
        active_read_buff_write(0x44);
        break;
    case SC_RIGHTARR:
        active_read_buff_write(0x1b);
        active_read_buff_write(0x5b);
        active_read_buff_write(0x43);
        break;
    case SC_UPARR:
        active_read_buff_write(0x1b);
        active_read_buff_write(0x5b);
        active_read_buff_write(0x41);
        break;
    case SC_DOWNARR:
        active_read_buff_write(0x1b);
        active_read_buff_write(0x5b);
        active_read_buff_write(0x42);
        break;
    case SC_HOME:
        active_read_buff_write(0x1b);
        active_read_buff_write(0x4f);
        active_read_buff_write(0x48);
        break;
    case SC_END:
        active_read_buff_write(0x1b);
        active_read_buff_write(0x4f);
        active_read_buff_write(0x46);
        break;
    case SC_DELETE:
        active_read_buff_write(0x1b);
        active_read_buff_write(0x5b);
        active_read_buff_write(0x33);
        active_read_buff_write(0x7e);
        break;
    default:
            letter = is_lower(ascii);
        capslock = (keyflags & PRESSED_CAPSLOCK) || (lockflags & LOCKED_CAPSLOCK);
        shift = keyflags & PRESSED_SHIFT;
        if (letter && capslock)
            shift = !shift;
        if (shift)
            map = sc_secondary_map;
        active_read_buff_write(map[sc]);
        break;
    }
    /*spinlock_unlock(&keylock);*/
 
}
 
static char key_read(chardev_t *d)
{
    char ch;   
 
    while(!(ch = active_read_buff_read())) {
        uint8_t x;
        while (!(i8042_status_read() & i8042_BUFFER_FULL_MASK))
            ;
        x = i8042_data_read();
        if (x != IGNORE_CODE) {
            if (x & KEY_RELEASE)
                key_released(x ^ KEY_RELEASE);
            else
                active_read_key_pressed(x);
        }
    }
    return ch;
}
 
/** Poll for key press and release events.
 *
 * This function can be used to implement keyboard polling.
 */
void i8042_poll(void)
{
    uint8_t x;
 
    while (((x = i8042_status_read() & i8042_BUFFER_FULL_MASK))) {
        x = i8042_data_read();
        if (x != IGNORE_CODE) {
            if (x & KEY_RELEASE)
                key_released(x ^ KEY_RELEASE);
            else
                key_pressed(x);
        }
    }
}
 
/** @}
 */
 
 

Rev 1759	Rev 1780
1	/*	1	/*
2	* Copyright (C) 2001-2004 Jakub Jermar	2	* Copyright (C) 2001-2004 Jakub Jermar
3	* All rights reserved.	3	* All rights reserved.
4	*	4	*
5	* Redistribution and use in source and binary forms, with or without	5	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions	6	* modification, are permitted provided that the following conditions
7	* are met:	7	* are met:
8	*	8	*
9	* - Redistributions of source code must retain the above copyright	9	* - Redistributions of source code must retain the above copyright
10	* notice, this list of conditions and the following disclaimer.	10	* notice, this list of conditions and the following disclaimer.
11	* - Redistributions in binary form must reproduce the above copyright	11	* - Redistributions in binary form must reproduce the above copyright
12	* notice, this list of conditions and the following disclaimer in the	12	* notice, this list of conditions and the following disclaimer in the
13	* documentation and/or other materials provided with the distribution.	13	* documentation and/or other materials provided with the distribution.
14	* - The name of the author may not be used to endorse or promote products	14	* - The name of the author may not be used to endorse or promote products
15	* derived from this software without specific prior written permission.	15	* derived from this software without specific prior written permission.
16	*	16	*
17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES	18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF	25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27	*/	27	*/
28		28
29	/** @addtogroup genarch	29	/** @addtogroup genarch
30	* @{	30	* @{
31	*/	31	*/
32	/**	32	/**
33	* @file	33	* @file
34	* @brief i8042 processor driver.	34	* @brief i8042 processor driver.
35	*	35	*
36	* It takes care of low-level keyboard functions.	36	* It takes care of low-level keyboard functions.
37	*/	37	*/
38		38
39	#include <genarch/i8042/i8042.h>	39	#include <genarch/i8042/i8042.h>
40	#include <arch/drivers/i8042.h>	40	#include <arch/drivers/i8042.h>
41	#include <arch/interrupt.h>	41	#include <arch/interrupt.h>
42	#include <cpu.h>	42	#include <cpu.h>
43	#include <arch/asm.h>	43	#include <arch/asm.h>
44	#include <arch.h>	44	#include <arch.h>
45	#include <synch/spinlock.h>	45	#include <synch/spinlock.h>
46	#include <typedefs.h>	46	#include <typedefs.h>
47	#include <console/chardev.h>	47	#include <console/chardev.h>
48	#include <console/console.h>	48	#include <console/console.h>
49	#include <macros.h>	49	#include <macros.h>
50	#include <interrupt.h>	50	#include <interrupt.h>
51		51
52	/* Keyboard commands. */	52	/* Keyboard commands. */
53	#define KBD_ENABLE 0xf4	53	#define KBD_ENABLE 0xf4
54	#define KBD_DISABLE 0xf5	54	#define KBD_DISABLE 0xf5
55	#define KBD_ACK 0xfa	55	#define KBD_ACK 0xfa
56		56
57	/*	57	/*
58	* 60 Write 8042 Command Byte: next data byte written to port 60h is	58	* 60 Write 8042 Command Byte: next data byte written to port 60h is
59	* placed in 8042 command register. Format:	59	* placed in 8042 command register. Format:
60	*	60	*
61	* \|7\|6\|5\|4\|3\|2\|1\|0\|8042 Command Byte	61	* \|7\|6\|5\|4\|3\|2\|1\|0\|8042 Command Byte
62	* \| \| \| \| \| \| \| `---- 1=enable output register full interrupt	62	* \| \| \| \| \| \| \| `---- 1=enable output register full interrupt
63	* \| \| \| \| \| \| `----- should be 0	63	* \| \| \| \| \| \| `----- should be 0
64	* \| \| \| \| \| `------ 1=set status register system, 0=clear	64	* \| \| \| \| \| `------ 1=set status register system, 0=clear
65	* \| \| \| \| `------- 1=override keyboard inhibit, 0=allow inhibit	65	* \| \| \| \| `------- 1=override keyboard inhibit, 0=allow inhibit
66	* \| \| \| `-------- disable keyboard I/O by driving clock line low	66	* \| \| \| `-------- disable keyboard I/O by driving clock line low
67	* \| \| `--------- disable auxiliary device, drives clock line low	67	* \| \| `--------- disable auxiliary device, drives clock line low
68	* \| `---------- IBM scancode translation 0=AT, 1=PC/XT	68	* \| `---------- IBM scancode translation 0=AT, 1=PC/XT
69	* `----------- reserved, should be 0	69	* `----------- reserved, should be 0
70	*/	70	*/
71		71
72	#define i8042_SET_COMMAND 0x60	72	#define i8042_SET_COMMAND 0x60
73	#define i8042_COMMAND 0x69	73	#define i8042_COMMAND 0x69
74		74
75	#define i8042_BUFFER_FULL_MASK 0x01	75	#define i8042_BUFFER_FULL_MASK 0x01
76	#define i8042_WAIT_MASK 0x02	76	#define i8042_WAIT_MASK 0x02
77	#define i8042_MOUSE_DATA 0x20	77	#define i8042_MOUSE_DATA 0x20
78		78
79	#define SPECIAL '?'	79	#define SPECIAL '?'
80	#define KEY_RELEASE 0x80	80	#define KEY_RELEASE 0x80
81		81
82	/**	82	/**
83	* These codes read from i8042 data register are silently ignored.	83	* These codes read from i8042 data register are silently ignored.
84	*/	84	*/
85	#define IGNORE_CODE 0x7f	85	#define IGNORE_CODE 0x7f
86		86
87	static void key_released(__u8 sc);	87	static void key_released(uint8_t sc);
88	static void key_pressed(__u8 sc);	88	static void key_pressed(uint8_t sc);
89	static char key_read(chardev_t *d);	89	static char key_read(chardev_t *d);
90		90
91	#define PRESSED_SHIFT (1<<0)	91	#define PRESSED_SHIFT (1<<0)
92	#define PRESSED_CAPSLOCK (1<<1)	92	#define PRESSED_CAPSLOCK (1<<1)
93	#define LOCKED_CAPSLOCK (1<<0)	93	#define LOCKED_CAPSLOCK (1<<0)
94		94
95	#define ACTIVE_READ_BUFF_SIZE 16 /* Must be power of 2 */	95	#define ACTIVE_READ_BUFF_SIZE 16 /* Must be power of 2 */
96		96
97	static __u8 active_read_buff[ACTIVE_READ_BUFF_SIZE];	97	static uint8_t active_read_buff[ACTIVE_READ_BUFF_SIZE];
98		98
99	SPINLOCK_INITIALIZE(keylock); /*< keylock protects keyflags and lockflags. /	99	SPINLOCK_INITIALIZE(keylock); /*< keylock protects keyflags and lockflags. /
100	static volatile int keyflags; /*< Tracking of multiple keypresses. /	100	static volatile int keyflags; /*< Tracking of multiple keypresses. /
101	static volatile int lockflags; /*< Tracking of multiple keys lockings. /	101	static volatile int lockflags; /*< Tracking of multiple keys lockings. /
102		102
103	static void i8042_suspend(chardev_t *);	103	static void i8042_suspend(chardev_t *);
104	static void i8042_resume(chardev_t *);	104	static void i8042_resume(chardev_t *);
105		105
106	static chardev_t kbrd;	106	static chardev_t kbrd;
107	static chardev_operations_t ops = {	107	static chardev_operations_t ops = {
108	.suspend = i8042_suspend,	108	.suspend = i8042_suspend,
109	.resume = i8042_resume,	109	.resume = i8042_resume,
110	.read = key_read	110	.read = key_read
111	};	111	};
112		112
113	/** Primary meaning of scancodes. */	113	/** Primary meaning of scancodes. */
114	static char sc_primary_map[] = {	114	static char sc_primary_map[] = {
115	SPECIAL, /* 0x00 */	115	SPECIAL, /* 0x00 */
116	SPECIAL, /* 0x01 - Esc */	116	SPECIAL, /* 0x01 - Esc */
117	'1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '-', '=',	117	'1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '-', '=',
118	'\b', /* 0x0e - Backspace */	118	'\b', /* 0x0e - Backspace */
119	'\t', 'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p', '[', ']', '\n',	119	'\t', 'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p', '[', ']', '\n',
120	SPECIAL, /* 0x1d - LCtrl */	120	SPECIAL, /* 0x1d - LCtrl */
121	'a', 's', 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';', '\'',	121	'a', 's', 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';', '\'',
122	'`',	122	'`',
123	SPECIAL, /* 0x2a - LShift */	123	SPECIAL, /* 0x2a - LShift */
124	'\\',	124	'\\',
125	'z', 'x', 'c', 'v', 'b', 'n', 'm', ',', '.', '/',	125	'z', 'x', 'c', 'v', 'b', 'n', 'm', ',', '.', '/',
126	SPECIAL, /* 0x36 - RShift */	126	SPECIAL, /* 0x36 - RShift */
127	'*',	127	'*',
128	SPECIAL, /* 0x38 - LAlt */	128	SPECIAL, /* 0x38 - LAlt */
129	' ',	129	' ',
130	SPECIAL, /* 0x3a - CapsLock */	130	SPECIAL, /* 0x3a - CapsLock */
131	SPECIAL, /* 0x3b - F1 */	131	SPECIAL, /* 0x3b - F1 */
132	SPECIAL, /* 0x3c - F2 */	132	SPECIAL, /* 0x3c - F2 */
133	SPECIAL, /* 0x3d - F3 */	133	SPECIAL, /* 0x3d - F3 */
134	SPECIAL, /* 0x3e - F4 */	134	SPECIAL, /* 0x3e - F4 */
135	SPECIAL, /* 0x3f - F5 */	135	SPECIAL, /* 0x3f - F5 */
136	SPECIAL, /* 0x40 - F6 */	136	SPECIAL, /* 0x40 - F6 */
137	SPECIAL, /* 0x41 - F7 */	137	SPECIAL, /* 0x41 - F7 */
138	SPECIAL, /* 0x42 - F8 */	138	SPECIAL, /* 0x42 - F8 */
139	SPECIAL, /* 0x43 - F9 */	139	SPECIAL, /* 0x43 - F9 */
140	SPECIAL, /* 0x44 - F10 */	140	SPECIAL, /* 0x44 - F10 */
141	SPECIAL, /* 0x45 - NumLock */	141	SPECIAL, /* 0x45 - NumLock */
142	SPECIAL, /* 0x46 - ScrollLock */	142	SPECIAL, /* 0x46 - ScrollLock */
143	'7', '8', '9', '-',	143	'7', '8', '9', '-',
144	'4', '5', '6', '+',	144	'4', '5', '6', '+',
145	'1', '2', '3',	145	'1', '2', '3',
146	'0', '.',	146	'0', '.',
147	SPECIAL, /* 0x54 - Alt-SysRq */	147	SPECIAL, /* 0x54 - Alt-SysRq */
148	SPECIAL, /* 0x55 - F11/F12/PF1/FN */	148	SPECIAL, /* 0x55 - F11/F12/PF1/FN */
149	SPECIAL, /* 0x56 - unlabelled key next to LAlt */	149	SPECIAL, /* 0x56 - unlabelled key next to LAlt */
150	SPECIAL, /* 0x57 - F11 */	150	SPECIAL, /* 0x57 - F11 */
151	SPECIAL, /* 0x58 - F12 */	151	SPECIAL, /* 0x58 - F12 */
152	SPECIAL, /* 0x59 */	152	SPECIAL, /* 0x59 */
153	SPECIAL, /* 0x5a */	153	SPECIAL, /* 0x5a */
154	SPECIAL, /* 0x5b */	154	SPECIAL, /* 0x5b */
155	SPECIAL, /* 0x5c */	155	SPECIAL, /* 0x5c */
156	SPECIAL, /* 0x5d */	156	SPECIAL, /* 0x5d */
157	SPECIAL, /* 0x5e */	157	SPECIAL, /* 0x5e */
158	SPECIAL, /* 0x5f */	158	SPECIAL, /* 0x5f */
159	SPECIAL, /* 0x60 */	159	SPECIAL, /* 0x60 */
160	SPECIAL, /* 0x61 */	160	SPECIAL, /* 0x61 */
161	SPECIAL, /* 0x62 */	161	SPECIAL, /* 0x62 */
162	SPECIAL, /* 0x63 */	162	SPECIAL, /* 0x63 */
163	SPECIAL, /* 0x64 */	163	SPECIAL, /* 0x64 */
164	SPECIAL, /* 0x65 */	164	SPECIAL, /* 0x65 */
165	SPECIAL, /* 0x66 */	165	SPECIAL, /* 0x66 */
166	SPECIAL, /* 0x67 */	166	SPECIAL, /* 0x67 */
167	SPECIAL, /* 0x68 */	167	SPECIAL, /* 0x68 */
168	SPECIAL, /* 0x69 */	168	SPECIAL, /* 0x69 */
169	SPECIAL, /* 0x6a */	169	SPECIAL, /* 0x6a */
170	SPECIAL, /* 0x6b */	170	SPECIAL, /* 0x6b */
171	SPECIAL, /* 0x6c */	171	SPECIAL, /* 0x6c */
172	SPECIAL, /* 0x6d */	172	SPECIAL, /* 0x6d */
173	SPECIAL, /* 0x6e */	173	SPECIAL, /* 0x6e */
174	SPECIAL, /* 0x6f */	174	SPECIAL, /* 0x6f */
175	SPECIAL, /* 0x70 */	175	SPECIAL, /* 0x70 */
176	SPECIAL, /* 0x71 */	176	SPECIAL, /* 0x71 */
177	SPECIAL, /* 0x72 */	177	SPECIAL, /* 0x72 */
178	SPECIAL, /* 0x73 */	178	SPECIAL, /* 0x73 */
179	SPECIAL, /* 0x74 */	179	SPECIAL, /* 0x74 */
180	SPECIAL, /* 0x75 */	180	SPECIAL, /* 0x75 */
181	SPECIAL, /* 0x76 */	181	SPECIAL, /* 0x76 */
182	SPECIAL, /* 0x77 */	182	SPECIAL, /* 0x77 */
183	SPECIAL, /* 0x78 */	183	SPECIAL, /* 0x78 */
184	SPECIAL, /* 0x79 */	184	SPECIAL, /* 0x79 */
185	SPECIAL, /* 0x7a */	185	SPECIAL, /* 0x7a */
186	SPECIAL, /* 0x7b */	186	SPECIAL, /* 0x7b */
187	SPECIAL, /* 0x7c */	187	SPECIAL, /* 0x7c */
188	SPECIAL, /* 0x7d */	188	SPECIAL, /* 0x7d */
189	SPECIAL, /* 0x7e */	189	SPECIAL, /* 0x7e */
190	SPECIAL, /* 0x7f */	190	SPECIAL, /* 0x7f */
191	};	191	};
192		192
193	/** Secondary meaning of scancodes. */	193	/** Secondary meaning of scancodes. */
194	static char sc_secondary_map[] = {	194	static char sc_secondary_map[] = {
195	SPECIAL, /* 0x00 */	195	SPECIAL, /* 0x00 */
196	SPECIAL, /* 0x01 - Esc */	196	SPECIAL, /* 0x01 - Esc */
197	'!', '@', '#', '$', '%', '^', '&', '*', '(', ')', '_', '+',	197	'!', '@', '#', '$', '%', '^', '&', '*', '(', ')', '_', '+',
198	SPECIAL, /* 0x0e - Backspace */	198	SPECIAL, /* 0x0e - Backspace */
199	'\t', 'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P', '{', '}', '\n',	199	'\t', 'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P', '{', '}', '\n',
200	SPECIAL, /* 0x1d - LCtrl */	200	SPECIAL, /* 0x1d - LCtrl */
201	'A', 'S', 'D', 'F', 'G', 'H', 'J', 'K', 'L', ':', '"',	201	'A', 'S', 'D', 'F', 'G', 'H', 'J', 'K', 'L', ':', '"',
202	'~',	202	'~',
203	SPECIAL, /* 0x2a - LShift */	203	SPECIAL, /* 0x2a - LShift */
204	'\|',	204	'\|',
205	'Z', 'X', 'C', 'V', 'B', 'N', 'M', '<', '>', '?',	205	'Z', 'X', 'C', 'V', 'B', 'N', 'M', '<', '>', '?',
206	SPECIAL, /* 0x36 - RShift */	206	SPECIAL, /* 0x36 - RShift */
207	'*',	207	'*',
208	SPECIAL, /* 0x38 - LAlt */	208	SPECIAL, /* 0x38 - LAlt */
209	' ',	209	' ',
210	SPECIAL, /* 0x3a - CapsLock */	210	SPECIAL, /* 0x3a - CapsLock */
211	SPECIAL, /* 0x3b - F1 */	211	SPECIAL, /* 0x3b - F1 */
212	SPECIAL, /* 0x3c - F2 */	212	SPECIAL, /* 0x3c - F2 */
213	SPECIAL, /* 0x3d - F3 */	213	SPECIAL, /* 0x3d - F3 */
214	SPECIAL, /* 0x3e - F4 */	214	SPECIAL, /* 0x3e - F4 */
215	SPECIAL, /* 0x3f - F5 */	215	SPECIAL, /* 0x3f - F5 */
216	SPECIAL, /* 0x40 - F6 */	216	SPECIAL, /* 0x40 - F6 */
217	SPECIAL, /* 0x41 - F7 */	217	SPECIAL, /* 0x41 - F7 */
218	SPECIAL, /* 0x42 - F8 */	218	SPECIAL, /* 0x42 - F8 */
219	SPECIAL, /* 0x43 - F9 */	219	SPECIAL, /* 0x43 - F9 */
220	SPECIAL, /* 0x44 - F10 */	220	SPECIAL, /* 0x44 - F10 */
221	SPECIAL, /* 0x45 - NumLock */	221	SPECIAL, /* 0x45 - NumLock */
222	SPECIAL, /* 0x46 - ScrollLock */	222	SPECIAL, /* 0x46 - ScrollLock */
223	'7', '8', '9', '-',	223	'7', '8', '9', '-',
224	'4', '5', '6', '+',	224	'4', '5', '6', '+',
225	'1', '2', '3',	225	'1', '2', '3',
226	'0', '.',	226	'0', '.',
227	SPECIAL, /* 0x54 - Alt-SysRq */	227	SPECIAL, /* 0x54 - Alt-SysRq */
228	SPECIAL, /* 0x55 - F11/F12/PF1/FN */	228	SPECIAL, /* 0x55 - F11/F12/PF1/FN */
229	SPECIAL, /* 0x56 - unlabelled key next to LAlt */	229	SPECIAL, /* 0x56 - unlabelled key next to LAlt */
230	SPECIAL, /* 0x57 - F11 */	230	SPECIAL, /* 0x57 - F11 */
231	SPECIAL, /* 0x58 - F12 */	231	SPECIAL, /* 0x58 - F12 */
232	SPECIAL, /* 0x59 */	232	SPECIAL, /* 0x59 */
233	SPECIAL, /* 0x5a */	233	SPECIAL, /* 0x5a */
234	SPECIAL, /* 0x5b */	234	SPECIAL, /* 0x5b */
235	SPECIAL, /* 0x5c */	235	SPECIAL, /* 0x5c */
236	SPECIAL, /* 0x5d */	236	SPECIAL, /* 0x5d */
237	SPECIAL, /* 0x5e */	237	SPECIAL, /* 0x5e */
238	SPECIAL, /* 0x5f */	238	SPECIAL, /* 0x5f */
239	SPECIAL, /* 0x60 */	239	SPECIAL, /* 0x60 */
240	SPECIAL, /* 0x61 */	240	SPECIAL, /* 0x61 */
241	SPECIAL, /* 0x62 */	241	SPECIAL, /* 0x62 */
242	SPECIAL, /* 0x63 */	242	SPECIAL, /* 0x63 */
243	SPECIAL, /* 0x64 */	243	SPECIAL, /* 0x64 */
244	SPECIAL, /* 0x65 */	244	SPECIAL, /* 0x65 */
245	SPECIAL, /* 0x66 */	245	SPECIAL, /* 0x66 */
246	SPECIAL, /* 0x67 */	246	SPECIAL, /* 0x67 */
247	SPECIAL, /* 0x68 */	247	SPECIAL, /* 0x68 */
248	SPECIAL, /* 0x69 */	248	SPECIAL, /* 0x69 */
249	SPECIAL, /* 0x6a */	249	SPECIAL, /* 0x6a */
250	SPECIAL, /* 0x6b */	250	SPECIAL, /* 0x6b */
251	SPECIAL, /* 0x6c */	251	SPECIAL, /* 0x6c */
252	SPECIAL, /* 0x6d */	252	SPECIAL, /* 0x6d */
253	SPECIAL, /* 0x6e */	253	SPECIAL, /* 0x6e */
254	SPECIAL, /* 0x6f */	254	SPECIAL, /* 0x6f */
255	SPECIAL, /* 0x70 */	255	SPECIAL, /* 0x70 */
256	SPECIAL, /* 0x71 */	256	SPECIAL, /* 0x71 */
257	SPECIAL, /* 0x72 */	257	SPECIAL, /* 0x72 */
258	SPECIAL, /* 0x73 */	258	SPECIAL, /* 0x73 */
259	SPECIAL, /* 0x74 */	259	SPECIAL, /* 0x74 */
260	SPECIAL, /* 0x75 */	260	SPECIAL, /* 0x75 */
261	SPECIAL, /* 0x76 */	261	SPECIAL, /* 0x76 */
262	SPECIAL, /* 0x77 */	262	SPECIAL, /* 0x77 */
263	SPECIAL, /* 0x78 */	263	SPECIAL, /* 0x78 */
264	SPECIAL, /* 0x79 */	264	SPECIAL, /* 0x79 */
265	SPECIAL, /* 0x7a */	265	SPECIAL, /* 0x7a */
266	SPECIAL, /* 0x7b */	266	SPECIAL, /* 0x7b */
267	SPECIAL, /* 0x7c */	267	SPECIAL, /* 0x7c */
268	SPECIAL, /* 0x7d */	268	SPECIAL, /* 0x7d */
269	SPECIAL, /* 0x7e */	269	SPECIAL, /* 0x7e */
270	SPECIAL, /* 0x7f */	270	SPECIAL, /* 0x7f */
271	};	271	};
272		272
273	static void i8042_interrupt(int n, istate_t *istate);	273	static void i8042_interrupt(int n, istate_t *istate);
274	static void i8042_wait(void);	274	static void i8042_wait(void);
275		275
276	static iroutine oldvector;	276	static iroutine oldvector;
277	/** Initialize keyboard and service interrupts using kernel routine */	277	/** Initialize keyboard and service interrupts using kernel routine */
278	void i8042_grab(void)	278	void i8042_grab(void)
279	{	279	{
280	oldvector = exc_register(VECTOR_KBD, "i8042_interrupt", (iroutine) i8042_interrupt);	280	oldvector = exc_register(VECTOR_KBD, "i8042_interrupt", (iroutine) i8042_interrupt);
281	i8042_wait();	281	i8042_wait();
282	i8042_command_write(i8042_SET_COMMAND);	282	i8042_command_write(i8042_SET_COMMAND);
283	i8042_wait();	283	i8042_wait();
284	i8042_data_write(i8042_COMMAND);	284	i8042_data_write(i8042_COMMAND);
285	i8042_wait();	285	i8042_wait();
286	}	286	}
287	/** Resume the former interrupt vector */	287	/** Resume the former interrupt vector */
288	void i8042_release(void)	288	void i8042_release(void)
289	{	289	{
290	if (oldvector)	290	if (oldvector)
291	exc_register(VECTOR_KBD, "user_interrupt", oldvector);	291	exc_register(VECTOR_KBD, "user_interrupt", oldvector);
292	}	292	}
293		293
294	/** Initialize i8042. */	294	/** Initialize i8042. */
295	void i8042_init(void)	295	void i8042_init(void)
296	{	296	{
297	int i;	297	int i;
298		298
299	i8042_grab();	299	i8042_grab();
300	/* Prevent user from accidentaly releasing calling i8042_resume	300	/* Prevent user from accidentaly releasing calling i8042_resume
301	* and disabling keyboard	301	* and disabling keyboard
302	*/	302	*/
303	oldvector = NULL;	303	oldvector = NULL;
304		304
305	trap_virtual_enable_irqs(1<<IRQ_KBD);	305	trap_virtual_enable_irqs(1<<IRQ_KBD);
306	chardev_initialize("i8042_kbd", &kbrd, &ops);	306	chardev_initialize("i8042_kbd", &kbrd, &ops);
307	stdin = &kbrd;	307	stdin = &kbrd;
308		308
309	/*	309	/*
310	* Clear input buffer.	310	* Clear input buffer.
311	* Number of iterations is limited to prevent infinite looping.	311	* Number of iterations is limited to prevent infinite looping.
312	*/	312	*/
313	for (i = 0; (i8042_status_read() & i8042_BUFFER_FULL_MASK) && i < 100; i++) {	313	for (i = 0; (i8042_status_read() & i8042_BUFFER_FULL_MASK) && i < 100; i++) {
314	i8042_data_read();	314	i8042_data_read();
315	}	315	}
316	}	316	}
317		317
318	/** Process i8042 interrupt.	318	/** Process i8042 interrupt.
319	*	319	*
320	* @param n Interrupt vector.	320	* @param n Interrupt vector.
321	* @param istate Interrupted state.	321	* @param istate Interrupted state.
322	*/	322	*/
323	void i8042_interrupt(int n, istate_t *istate)	323	void i8042_interrupt(int n, istate_t *istate)
324	{	324	{
325	__u8 x;	325	uint8_t x;
326	__u8 status;	326	uint8_t status;
327		327
328	while (((status=i8042_status_read()) & i8042_BUFFER_FULL_MASK)) {	328	while (((status=i8042_status_read()) & i8042_BUFFER_FULL_MASK)) {
329	x = i8042_data_read();	329	x = i8042_data_read();
330		330
331	if ((status & i8042_MOUSE_DATA))	331	if ((status & i8042_MOUSE_DATA))
332	continue;	332	continue;
333		333
334	if (x & KEY_RELEASE)	334	if (x & KEY_RELEASE)
335	key_released(x ^ KEY_RELEASE);	335	key_released(x ^ KEY_RELEASE);
336	else	336	else
337	key_pressed(x);	337	key_pressed(x);
338	}	338	}
339	trap_virtual_eoi();	339	trap_virtual_eoi();
340	}	340	}
341		341
342	/** Wait until the controller reads its data. */	342	/** Wait until the controller reads its data. */
343	void i8042_wait(void) {	343	void i8042_wait(void) {
344	while (i8042_status_read() & i8042_WAIT_MASK) {	344	while (i8042_status_read() & i8042_WAIT_MASK) {
345	/* wait */	345	/* wait */
346	}	346	}
347	}	347	}
348		348
349	/** Process release of key.	349	/** Process release of key.
350	*	350	*
351	* @param sc Scancode of the key being released.	351	* @param sc Scancode of the key being released.
352	*/	352	*/
353	void key_released(__u8 sc)	353	void key_released(uint8_t sc)
354	{	354	{
355	spinlock_lock(&keylock);	355	spinlock_lock(&keylock);
356	switch (sc) {	356	switch (sc) {
357	case SC_LSHIFT:	357	case SC_LSHIFT:
358	case SC_RSHIFT:	358	case SC_RSHIFT:
359	keyflags &= ~PRESSED_SHIFT;	359	keyflags &= ~PRESSED_SHIFT;
360	break;	360	break;
361	case SC_CAPSLOCK:	361	case SC_CAPSLOCK:
362	keyflags &= ~PRESSED_CAPSLOCK;	362	keyflags &= ~PRESSED_CAPSLOCK;
363	if (lockflags & LOCKED_CAPSLOCK)	363	if (lockflags & LOCKED_CAPSLOCK)
364	lockflags &= ~LOCKED_CAPSLOCK;	364	lockflags &= ~LOCKED_CAPSLOCK;
365	else	365	else
366	lockflags \|= LOCKED_CAPSLOCK;	366	lockflags \|= LOCKED_CAPSLOCK;
367	break;	367	break;
368	default:	368	default:
369	break;	369	break;
370	}	370	}
371	spinlock_unlock(&keylock);	371	spinlock_unlock(&keylock);
372	}	372	}
373		373
374	/** Process keypress.	374	/** Process keypress.
375	*	375	*
376	* @param sc Scancode of the key being pressed.	376	* @param sc Scancode of the key being pressed.
377	*/	377	*/
378	void key_pressed(__u8 sc)	378	void key_pressed(uint8_t sc)
379	{	379	{
380	char *map = sc_primary_map;	380	char *map = sc_primary_map;
381	char ascii = sc_primary_map[sc];	381	char ascii = sc_primary_map[sc];
382	bool shift, capslock;	382	bool shift, capslock;
383	bool letter = false;	383	bool letter = false;
384		384
385	spinlock_lock(&keylock);	385	spinlock_lock(&keylock);
386	switch (sc) {	386	switch (sc) {
387	case SC_LSHIFT:	387	case SC_LSHIFT:
388	case SC_RSHIFT:	388	case SC_RSHIFT:
389	keyflags \|= PRESSED_SHIFT;	389	keyflags \|= PRESSED_SHIFT;
390	break;	390	break;
391	case SC_CAPSLOCK:	391	case SC_CAPSLOCK:
392	keyflags \|= PRESSED_CAPSLOCK;	392	keyflags \|= PRESSED_CAPSLOCK;
393	break;	393	break;
394	case SC_SPEC_ESCAPE:	394	case SC_SPEC_ESCAPE:
395	break;	395	break;
396	case SC_LEFTARR:	396	case SC_LEFTARR:
397	chardev_push_character(&kbrd, 0x1b);	397	chardev_push_character(&kbrd, 0x1b);
398	chardev_push_character(&kbrd, 0x5b);	398	chardev_push_character(&kbrd, 0x5b);
399	chardev_push_character(&kbrd, 0x44);	399	chardev_push_character(&kbrd, 0x44);
400	break;	400	break;
401	case SC_RIGHTARR:	401	case SC_RIGHTARR:
402	chardev_push_character(&kbrd, 0x1b);	402	chardev_push_character(&kbrd, 0x1b);
403	chardev_push_character(&kbrd, 0x5b);	403	chardev_push_character(&kbrd, 0x5b);
404	chardev_push_character(&kbrd, 0x43);	404	chardev_push_character(&kbrd, 0x43);
405	break;	405	break;
406	case SC_UPARR:	406	case SC_UPARR:
407	chardev_push_character(&kbrd, 0x1b);	407	chardev_push_character(&kbrd, 0x1b);
408	chardev_push_character(&kbrd, 0x5b);	408	chardev_push_character(&kbrd, 0x5b);
409	chardev_push_character(&kbrd, 0x41);	409	chardev_push_character(&kbrd, 0x41);
410	break;	410	break;
411	case SC_DOWNARR:	411	case SC_DOWNARR:
412	chardev_push_character(&kbrd, 0x1b);	412	chardev_push_character(&kbrd, 0x1b);
413	chardev_push_character(&kbrd, 0x5b);	413	chardev_push_character(&kbrd, 0x5b);
414	chardev_push_character(&kbrd, 0x42);	414	chardev_push_character(&kbrd, 0x42);
415	break;	415	break;
416	case SC_HOME:	416	case SC_HOME:
417	chardev_push_character(&kbrd, 0x1b);	417	chardev_push_character(&kbrd, 0x1b);
418	chardev_push_character(&kbrd, 0x4f);	418	chardev_push_character(&kbrd, 0x4f);
419	chardev_push_character(&kbrd, 0x48);	419	chardev_push_character(&kbrd, 0x48);
420	break;	420	break;
421	case SC_END:	421	case SC_END:
422	chardev_push_character(&kbrd, 0x1b);	422	chardev_push_character(&kbrd, 0x1b);
423	chardev_push_character(&kbrd, 0x4f);	423	chardev_push_character(&kbrd, 0x4f);
424	chardev_push_character(&kbrd, 0x46);	424	chardev_push_character(&kbrd, 0x46);
425	break;	425	break;
426	case SC_DELETE:	426	case SC_DELETE:
427	chardev_push_character(&kbrd, 0x1b);	427	chardev_push_character(&kbrd, 0x1b);
428	chardev_push_character(&kbrd, 0x5b);	428	chardev_push_character(&kbrd, 0x5b);
429	chardev_push_character(&kbrd, 0x33);	429	chardev_push_character(&kbrd, 0x33);
430	chardev_push_character(&kbrd, 0x7e);	430	chardev_push_character(&kbrd, 0x7e);
431	break;	431	break;
432	default:	432	default:
433	letter = is_lower(ascii);	433	letter = is_lower(ascii);
434	capslock = (keyflags & PRESSED_CAPSLOCK) \|\| (lockflags & LOCKED_CAPSLOCK);	434	capslock = (keyflags & PRESSED_CAPSLOCK) \|\| (lockflags & LOCKED_CAPSLOCK);
435	shift = keyflags & PRESSED_SHIFT;	435	shift = keyflags & PRESSED_SHIFT;
436	if (letter && capslock)	436	if (letter && capslock)
437	shift = !shift;	437	shift = !shift;
438	if (shift)	438	if (shift)
439	map = sc_secondary_map;	439	map = sc_secondary_map;
440	chardev_push_character(&kbrd, map[sc]);	440	chardev_push_character(&kbrd, map[sc]);
441	break;	441	break;
442	}	442	}
443	spinlock_unlock(&keylock);	443	spinlock_unlock(&keylock);
444	}	444	}
445		445
446	/* Called from getc(). */	446	/* Called from getc(). */
447	void i8042_resume(chardev_t *d)	447	void i8042_resume(chardev_t *d)
448	{	448	{
449	}	449	}
450		450
451	/* Called from getc(). */	451	/* Called from getc(). */
452	void i8042_suspend(chardev_t *d)	452	void i8042_suspend(chardev_t *d)
453	{	453	{
454	}	454	}
455		455
456	static __u8 active_read_buff_read(void)	456	static uint8_t active_read_buff_read(void)
457	{	457	{
458	static int i=0;	458	static int i=0;
459	i &= (ACTIVE_READ_BUFF_SIZE-1);	459	i &= (ACTIVE_READ_BUFF_SIZE-1);
460	if(!active_read_buff[i]) {	460	if(!active_read_buff[i]) {
461	return 0;	461	return 0;
462	}	462	}
463	return active_read_buff[i++];	463	return active_read_buff[i++];
464	}	464	}
465		465
466	static void active_read_buff_write(__u8 ch)	466	static void active_read_buff_write(uint8_t ch)
467	{	467	{
468	static int i=0;	468	static int i=0;
469	active_read_buff[i] = ch;	469	active_read_buff[i] = ch;
470	i++;	470	i++;
471	i &= (ACTIVE_READ_BUFF_SIZE-1);	471	i &= (ACTIVE_READ_BUFF_SIZE-1);
472	active_read_buff[i]=0;	472	active_read_buff[i]=0;
473	}	473	}
474		474
475		475
476	static void active_read_key_pressed(__u8 sc)	476	static void active_read_key_pressed(uint8_t sc)
477	{	477	{
478	char *map = sc_primary_map;	478	char *map = sc_primary_map;
479	char ascii = sc_primary_map[sc];	479	char ascii = sc_primary_map[sc];
480	bool shift, capslock;	480	bool shift, capslock;
481	bool letter = false;	481	bool letter = false;
482		482
483	/spinlock_lock(&keylock);/	483	/spinlock_lock(&keylock);/
484	switch (sc) {	484	switch (sc) {
485	case SC_LSHIFT:	485	case SC_LSHIFT:
486	case SC_RSHIFT:	486	case SC_RSHIFT:
487	keyflags \|= PRESSED_SHIFT;	487	keyflags \|= PRESSED_SHIFT;
488	break;	488	break;
489	case SC_CAPSLOCK:	489	case SC_CAPSLOCK:
490	keyflags \|= PRESSED_CAPSLOCK;	490	keyflags \|= PRESSED_CAPSLOCK;
491	break;	491	break;
492	case SC_SPEC_ESCAPE:	492	case SC_SPEC_ESCAPE:
493	break;	493	break;
494	case SC_LEFTARR:	494	case SC_LEFTARR:
495	active_read_buff_write(0x1b);	495	active_read_buff_write(0x1b);
496	active_read_buff_write(0x5b);	496	active_read_buff_write(0x5b);
497	active_read_buff_write(0x44);	497	active_read_buff_write(0x44);
498	break;	498	break;
499	case SC_RIGHTARR:	499	case SC_RIGHTARR:
500	active_read_buff_write(0x1b);	500	active_read_buff_write(0x1b);

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(root)/kernel/trunk/genarch/src/i8042/i8042.c – Rev 1759 → 1780